I think the twist is that Bill thinks it’s the actual wedding and that she chooses her new life instead of him, breaking his heart, but in fact its not her actual wedding, and this makes it more of a shock and an unexpected massacre.
 It does give a more exciting twist on things, wen u see vol.2, cos u think its the actual wedding in vol1. I think that the Bride is even more scorned because it was on her wedding rehearsal, and maybe more confusing for her to recollect just why Bill did this to her. ???
